Every once in a while, a celebrity comes along that has a distinctive "look," a hair or a clothing style that, in time, comes to be associated with them. Think Diane Keaton and pantsuits, Anna Wintour and her bob, Isabella Blow and her hats, Kriss Kross and their backwards pants, Lisa "Left-Eye" Lopez and her condom glasses, and so on. And now: Blake Lively and her boobs. Recently, the 21-year-old Gossip Girl actress has been lauded for her long, blond, charmingly wild hair, but the assets Lively flaunts most flamboyantly are not on her head: They're on her chest. Like on Saturday night, when...